Tacker



K. F. MORBERG April 10, 1951 TACKER 2 Sheets-Sheeti Filed Nov. 5, 1945 m WM m fl April 1951 K. F. MORBERG 2,548,736

TACKER Filed Nov. 5, 1945 2 Sheets-Sheet 2 70 N 'A; P a h v n F a 6 fl g 3.225% :43 5'5 3 1/1 69 32a '55 INVENTOR.

Patented Apr. 10, 1951 UNITED STATES EATENT OFFICETI TACKER Kenneth F3 Morberg, Chicago; Ill., assignor to 7 Henry A. Torstenson, Chicago, Ill.

ApplicationNovember 5, 1945, Serial'NOL-r626,675

My. invention has to dowith improvements in aihand-operatedtacker or staple driving device of. the .type which comprises a forwardchamber having areciprocable. driving plunger therein,v a bottom horizontally, disposed. fastener feeding chamber'qfor. delivering. fasteners beneath; the driving plunger and raiplunger actuating. mechanism which ,is operated by aipivotal. rearwardly directed handlemembern It anpbjectl of .my-invention to. provide in v a, tacker of. the type. described improved means for feeding thev fasteners. into position beneath the driving. plunger.

It is afurther object of. my invention to provide. in a tacker cf theitype described improved bumper. meansfor cushioningthe movement of. the. plunger at theend. of .the driving stroke.

It is..a1so. an object of my invention to provide a tacker of the type described having a removable.jaw membenon the lowerforward portion of. the driving. head and improved means for.

removably securingthe jaw ..rnember in .position upon the driving head: V

other'objects and advantages. of myv invention will be apparent from the description. of the preferred form thereof, which is shown, byway 1 Claim. (01. 1.49)

member. I9 maybe secured to the inner faces of the framemembers I2+ and: Iain: any conventional manner.

The plunger I 8; has. a: recess 22. therein I which receives .-one. end rof.a compressionspring.

23. The other end of. the spring ZBI-abutsa topcap/member. 24 which-issecured-in position-on the .top of the forwardchamber-bymeans of apin which is' removably secured inrposition by aretaining spring-.26." ApIunger blade 2 1 is. removably-attached.to plunger. I8 bymeansofa pin23 secured. to the plunger [81 andv received. in an aperture. 2.9. in.thev blade-21..

Theplunger. I8. is. reciprocate d in. its guide chamber by. means. ofa. hand.-.operated. trip mechanism.-- Asshown .inFig, I; the trip .-mecha-. nism comprises.- a. handle. pivotally mounted. on=a .pin .3] journaled .in-Ythe. side. members -I 2, I 3. anda trip .pawl .-.32. pivoted on the .pin. 33..in. the. endiofthe handle..3l].. The..pawl 32,- comprises. an endmember 3.4 which .engagesin a'rece ss.35 in the plunger. I8; A-spring .arrangedon the pin 33L has. one end engaged by a. stop pin.. 31.

I and the. other end engaged-against .the. pawl. 32.

of example; in the accompanying drawings,.

whereiny.

Fig. .1. is .a side elevation of. theitacker;

Fig. 2 is a front end elevation of the tacker;

Fig. 3 is a rear-end elevation of the tacker'on the'line'.3- ..3 of Fig. 1;

ri ,4 is 3 a longitudinal seam taken on. line.

4-4 ofFig, 2; I Fig. 5 is a section taken on line 5-5 ofFig. v1; Fig. 6 is a section taken on line 6--5 of Fig. 1;

Fig. '7 is a section taken on line 7-7 of Fig. 6. Referring to Figs. 1, 2 and 4, my device comprises a main frame'member I8 which is generally U-shaped and'has a bottom II, forward side portions I2 and I3 and rearward side members-l4, I5. The forward side members I2*and l3 form a compartment or chamber 'in' which the driving members and the operating mechanism therefor are" housed: The forward edges lfi and I! of the-.rsidemembers- I2 and I3 are turned-inwardly;-to form-the-forwardside of a guide chamber which receives the driving plunger I8; A U-sha-ped plunger-guide member I9 israrranged in the upperportionof thefor- Ward chamber with its sides 29, 2i adjacent the sidei memberse I22 and I 34 so: that the forward edges 20', 2I' thereof form the rear of the guide chamber for the;plunger,Ili- The-plunger guide tending .toj-hold the. end .34 .of .the.pawl inv therea cesstiio-f the plunger I8. Thepawlsz .has abutment portions. 38.. which engage. with .thelower edges 39.of.the handle memberi3fl. The. arrange-: ment -.=is such :thatwhen the handle member. .38- is .moved. downwardly. from. the ..position showninFig. 4. and.pivotedaboutqthe. pint]. ithwill carry. the. pawl.32. upwardly.v as the latter .is urged. forwardly. by thespringl 35; The pawl=32 has alimitedniovement in the forward direction-due to the engagement of,theabutments- 38-,withthe edges- 39. ofitheehandle. memberd The-relationship. of the pivot. .pin.3 I with-respect toethe other.- members is..such,..that, as the .handle continues to movei downwardly, the pawl 32 carries the plunger- I B upwardly-I to a. predetermined. pointwhereupon continued movement. of: the handle moves..theends ILof thepa-wl .32..o.ut .o-f .engagement -with .the. r ecess-1 35-. in the. plunger. I 8:. and

allows. the. spring; 23 to. drive the-plunger I8 r downwardly. A spring-401s arranged on the-pin frame it include horizontal portions 43, 44 beranged. The handle grip 45 includes an upwardly projecting member 46 which'limits the downward movement of the movable handle 30.

Horizontally arranged on the bottom H of the frame In is a magazine or bottom chamber having mechanism for receiving a supply of staples 41 and delivering them into position for driving beneath the blade 21. This magazine comprises an outer channel member 48 arranged with its legs 49 and B downwardly directed and secured by set screws 51 or the like to the inner sides of the bottom portion of the frame side members [4, IS. The bottom 52 of the channel 48 forms a top cover for the fastener magazine. An inner channel member 54 is arranged with its legs 55, 56 upwardlyv directed but spaced from the channel 48 to provide a guideway 5! for receiving the fastener members 41. The bottom 58 of the channel 54 is secured to the base H of the frame by means of the set screws 59. At the forward end of the magazine a stop plate or channel block 60, Figs. 4 and '7, is provided which is secured to the channel members and provided for the extension of the guideway 51' in which the fasteners move into driving position beneath the driving blade 21.

The fasteners 41 are urged forwardly in the magazine by a pusher member 6|. As shown in Figs. 4 and 5 the pusher member 6| has downwardly extending legs 62, 63 which are received in the guideway 51 between the channel members 48 and 54. The forward edge of the pusher member 6! engages the rearmost staple 41 in the guideway. The pusher member 6| has centrally disposed downwardly directed'lugs 64 having aligned apertures G S therein which receive the forward end of a pusher rod 66, the end of the rod being enlarged so that the pusher member 61 is permanently but slidably secured on the rod. At therearward end, the rod .66 is turned upwardly and back upon itself to form a rearwardly directed hook 61. An aperture 68 is provided in theouter channel member 48 adjacent the rear thereof toreceive the hook 61 on the pusher rod 66. A compression spring 69 is arranged onthe rod 66 extending from the rear end thereof to the rearward one of the lugs 64 on the pusher member 6!. The spring 69 operates to urge thepusher member 6| forwardly and into engagement with the staples 41 and at the same time urges the pusher rod 66 rearwardly to hold the hook member 61 in engagement in the aperture 63.

At the lower forward end of the driving head there is provided a front jaw member 10. The inturned members l6, I! are cut away at their lower ends to receive the front portion of the jaw member as shown in Fig. 2. The jaw member 10 is arranged to be removably positioned on the frame, having rearwardly extending side members H and 12 which embrace the lower portion of the frame. On the inner side of the front wall of the jaw 10 a guide recess 1'3 is provided to receive the plunger blade 21. The recess 13 functions as a guide means for the blade 2'! and also as positioning or guide means for receiving the staples 41 in proper position for driving when the blade 21 has been raised preparatory to a driving operation. The rearwardly extending side members H and 12 are apertured at T4 and to receive a removable retaining pin 1'6.

Arranged beneath the lowermost position of the plunger l8 and above the forward end of the staple magazine is a bumper block 11. As seen in Figs. 5, 6 and 7, the bumper block 11 is received between the walls 20 and 2] of the guide plate l9 and rests on the bottom I9 of the same. The side walls 20 and 2! and the bottom IQ of the guide plate 19 have forward extensions 18, T9 and 80. The bumper block 11 has a recess 8| in the forward end thereof and arranged thereon is a bumper 82 having aportion 83 extending upwardly from the top surface of the bumper block. An enlarged portion 84 on the bumper 82 is received in an enlarged portion 85 of the recess 83 to retain the bumper therein and a compression spring 86 urges the bumper upwardly. The bumper block may be secured to the bottom 19' of guide plate I!) by set screws 81. A bore 88 is provided in the bumper block to receive the removable pin 16 which is provided to retain the jaw member 10 in position. The pin 16 is provided with a groove 89. Arranged in the bumper block 11 is a vertical recess 9!! in which there is received a pin 9! which is held in position in the recess by a spring 92 secured on the top of the bumper block 1'] by a set screw 93. The end of the pin 9| is urged by the spring 92 into. engagement in the groove 89 in the removable pin 16 to releasably retain the pin 16 whereby it may be readily removed to free the rearwardly extending members H, 12 and permit the removal of the front jaw member I0. This gives access to the forward portion of the fastener magazine to remove a damaged fastener or the like.

To use my tacker the forward bottom portion is positioned against the member in which it is desired to drive a staple. The user grips the handle members 30 and between the fingers and the palm of his hand to move the handle 30 toward the grip member 45. The pawl 32 is moved upwardly and raises the plunger l8 against the force of the spring 23. When the end 34 of pawl 32 is pulled from the'recess 35 in the plunger [8 the plunger IB is released to deliver the driving blow against the staple 41.

. which has been moved forward in the'magazine' In a fastener driving mechanism comprising.

a housing having an upright guideway, a driver mounted in said guideway, spring means-for forcing the driver downwardly to drive a fastener, means for feedingfasteners to a driving position beneath the'driver, means for raisingthe driver against the action of the spring to a" predetermined position and then releasing the same, a bumper block having a forward .'portion extending beneath the driver and provided with a recess therein, a spring pressed bumper member mounted in said recess whereby upon descent of the driver to deliver a blow to drive a staple the driver will engage the bumper near the end of its movement to cushion the same.

KENNETH MORBERG.

A (References 9 following page) specific details of construc- 5 REFERENCES CITED The following references are of record in the file of this patent:

Number UNITED STATES PATENTS 5 Name Date Chapman June 9, 1925 Polzer May 6, 1930 Polzer -1 Apr. 25, 1933 Krantz Apr. 18, 1939 1 Blumenbaum June 6, 1939 Number 9 Lindstrom Dec. 31, 1943 

